Rotary engine



Patented Dec. 27. |898.

nu. s|s,643.

E. B. TREE.

ROTARY ENGINE.

(Application med :una 2s.' 1897.;

(No Modal.) 3 sheets-sheet I.

Patented Dec. 27, i898.

E. B. TREE.

ROTARY ENGINE.

(Application led June 28, 1897.`

3 Sheets-Sheet 2.

(No Model.)

No. 6|6,643. Patented Dec. 27, |898. E. B. TREE.

ROTARY ENGINE.

(ppucaeion med .rune safe, 1697. ("0 New s sheets-ahw s.

IINiTED STATES PATENT OFFICE.

EBER BLAKE TREE, OF IVOODSTOOK, CANADA, ASSIGNOR, BY DIRECT AND MESNEASSIGNMENTS, TO IVILLIAM OLIVER TAYLOR, OF PRINCETON,

CAADA.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent No. 616,643, dated December27, 1898.

Application tiled .Tune 28, 1897. `Serial No. 642,590. (No model.)

fc @ZZ whom it 'nw/y concern:

Be it known that I, EBEE BLAKE TREE, insurance agent, ofthe town ofXVoodstock, in the county of Oxford, in the Province of Ontario, Canada,have invented certain new and useful Improvements in Rotary Engines, ofwhich the following is a specification.

My invention relates to improvements in rotary engines; and the objectof the invento tion is to design a simple, easily-controlled, noiseless,and economic forni of rotary engine in which there will be no backpressure, which may be run at a very high rate of speed with little wearor tear, and in which the expansion of the steam may be used asadvantageously, if not more so, than in the ordinary reciprocatingengine; and it consists, essentially, in the novel construction andarrangement of the parts hereinafter described, and zo more particularlyset forth in the claims.

Figure l is a perspective view of my rotary engine, with one side of thecasing partially in section to exhibit the interior construction. Fig.E2 is a vertical cross-section. Fig. 3 is a longitudinal verticalsect-ion. Fig. 4 is a detail showing the means of packing the slotsthrough which the wing-pistons extend. Fig. 5 is a perspective detail ofthe concentric packing-rings. Fig. G is a detail of the pistonring andend disks. Fig. 7 is a diagrammatic view of the piston-ring and innerperiphery of the casing.

In the drawings like letters and numerals of reference indicatecorresponding parts in each figure.

A is the main shaft, which has secured to its inner end the disk B. Oisthe outer diskplate of the casing, and c is the bushing, secured to thecasing, through which the shaft extends. O is the plate at the oppositeside, which is provided with a central hollow projecting portion c',having a central tapered aperture c2, through which extends the taperedend cs of the stud C2, which has a crankshaped end C4, the pin of whichI designate cl. The pin of courseis eccentric to the shaft. The stud O2is secured in position by a nut c, which is screwed onto the threadedreduced end.

B is the rin g-piston,which preferably forms 5o part of the disk B, andB2 is the disk on the opposite side thereof to the disk B. The hub ofthe disk B is keyed to the shaft A, and the hub of the disk B2 revolvesupon the stud O2.

l) is an annular projection on the disk B2, which iits into acorresponding recess in the end of the ring-piston B', and thereby formsa steam-tight joint between the disk and piston. The disk B2 is boltedto the ring-piston, so that the piston rotates with it. The lowerportion of the ring-piston in Fig. 3 is shown in dotted lines as one ofthe Wings hereinafter described is centrally located.

D is the central portion of the casing, which is secured to thedisk-plates by bolts CZ. It will be noticed that the inner sides ofdisks B and B2 are separated slightly from the central portion D andthat the outer sides of the disks B and B2 are separated from the disksC and C.

D is the bed-plate, which forinspart of the central portion D of thecasing, and D2 is a chamber formed beneath the central portion of thecasing and provided with ports d2 at each end.

D3 is the exhaust-port, which is formed of a series of tubular holesarranged in alinement. By making the exhaust-ports in this form I amenabled to preserve the concentric interior of t-he chamber D, Thechamber D4 is concentric to the pin c4, with the exception at the top,where it has a slight depression d3, into which the ring-piston fits.

G are split packing-rings, triangular in cross-section, which tit intocorresponding recesses in the central portion D at the edge of theconcentric chamber D4.

G are correspondingly-formed 'split packing-rings located peripherallycircumferentially outside of the packing-rings G and in correspondingrecesses.

G2 are manila packing-rings located to the inside of the packing-ringsG.

G3 are compression-rings (see Figs. 2 and 3) located to the inside ofthe manilapackingrings G2 and compressibly held against the manilapacking-rings G2 by the springs g2.

It will thus be seen that a perfectly steam'- tight joint is providedaround the edges of the chamber DL between the central portion D and therotatable disks B and B2.

H are wings provided with inwardly-extending arms 7i', which arejournaled on the pin c4, as indicated. The wings extend throughcross-slots 7L in the rollers H', such rollers extending throughapertures B3 in the ring-piston B' into recesses b3 and b4 in the disksB and B2, respectively.

h2 are two holes which extend through the rollers H', being open on theedge of the slot 7L, such holes being lled with manila, so as to renderthe slot through which the wings pass steam-tight. The concentric facesof the apertures B3, through which the rollers H extend, are' providedat each side with manila packings B4, which are held against the rollersH by the wedge-blocks (See Fig. The outer ends of the recesses b3 andb4, into which the rollers H' extend, are closed and made steam-tight bythe screw-caps b5. The outer and side edges of the wings H are packed bythe L-shaped packing-blocks, which extend along each side and to thecenter of the outer edge of each wing I'I, where they are beveled, asshown. A wedge-block E' fits between the center ends. To the inside ofthe L-shaped packing-blocks is situated manila packing E2, which iscompressibly held against the outer L-shaped packingblocks by the innerspring-held L-shaped compression-strips The wedge-block E is held so asto force the L-shaped blocks E outwardly by the cross-strip E4,compressed by one of the springs It will thus be 'seen that the edges ofthe wings H contacting with the disks B2 and inner periphery of thechamber D4 are rendered steam-tight.

J is a packing-block extending across the center of the recess (73, andJ is a manila packing-block situated above the packing-block J, and J2is a compression-strip located above Jthe manila packing. Thepacking-block J is made in two parts, separated by the wedgeshaped blockJ3. The strip J2 is made in two parts, separated by the plate J 4, whichis pressed by the springs j', so as to provide a wedging action to takeup the wear of the two parts of the block J', which, it will be n0-iiced on reference to Fig. 3, abut at the outside the packingrings G andGr'.

I are ports which lead from the central aperture I', preferably taperedfrom end to end and located in the upper portion of the casing above thepacking J, to points in the concentric chamber-DLl on each side of theupper portion of the ring-piston B'. The aperture I' is provided with avalve-plug I2, having a cut-o partition substantially U-shaped incross-section and a central longitudinal opening I3, leading to the openend of the aperture I', which communicates around the edge of the disk Band by the passage-way t' at the bottom with the exhaust.

K is a steam-chest secured at the top to the center portion D of thecasing.

K' is the steam-port, which is separated from the chest by the partitionK2.

7c is the valve-port in the partition K2,'and 7a' is the inlet-portleading from the top of the valve-chest into the steam-port.

7t3is the steam-pipe leading into the steamchest.

L is the valve-rod, which derives its upward-and-downward movementthrough the ordinary link-motion and eccentrics, which it is notnecessary to describe. It is snflicient to say that the valve-rodextends through the upper end of the steam-chest and is provided with aplate at the lower end having a port 754. The steam-port is ordinarilyclosed by the cock M is a handle which is connected to the end of thevalve-plug I', extends through a slot in the casing, and is designed toreverse the valve byswinging such handle upwardly, and thus reverse thedirection of rotation of the engine, as will be understood from what isdescribed hereinafter. At the same time the handle M would come incontact with the lower end of the bell-crank N, which is connected bythe bar n to the link, and such link will be thrown over into theposition shown in dotted lines, thus providing for the proper working ofthe valve for reversing.

Ashereinbefore described, I preferably provide three wings H. Instarting the engine I turn on the cock 705, so as to permit of the steamto pass from the chest through the steam-inlet port 7.5', port K',passage-way 2, into the valve-chamber I', whence it passes through thepassage-way I against the right wing Hin the position shown in thedrawings. The eccentric will now be so arranged on the shaft that thevalve-rod L would pass upwardly, opening the valve-port 7a andpermitting the steam to pass from the steam-chest through the port K andpassage-way 2, valveaperture I', and port I against the next succeedingwing. The cock-7c5may be at any time closed after once the engine isstarted. The eccentric is so timed that the steam is admitted throughthe port K' during a small part of the distance traversed by the wingfrom the position shown in the drawings to the position of the wingshown above the exhaust-port, and the expansion of the steam thusadmitted would take place to drive such wing the remaining portion ofthe distance to above the exhaust-port, thus utilizing to the greatestpossible extent the expansive force of the steam. Then the valve-rod iscaused to move downwardly still farther the port 7a4 will come oppositeto the port 7a and cause the admission of the steam for the nextsucceeding wing,when the expansion will take place as before. Upon thevalve-rod now being caused to rise by the eccentric the lower end of thevalve-plate will again nncoverthe port 71e and cause the admission ofthe steam against the third succeeding wing, thus providing for theadmission of the steam three times during the revolution, or once foreach

